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Finding the Fourth Proportional to 727.08, 1,089.26 and 361.44

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Solution

The fourth proportional to 727.08, 1,089.26 and 361.44 is: 541.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.08 : 1,089.26 = 361.44 : x
  2. Step 2: Convert to fraction form
    727.08/1,089.26 = 361.44/x
  3. Step 3: Cross multiply
    727.08x = 1,089.26 × 361.44
  4. Step 4: Simplify right side
    727.08x = 393,700.33
  5. Step 5: Solve for x
    x = 393,700.33/727.08
  6. Step 6: Final answer
    x = 541.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.